Method for mounting a semiconductor chip to a semiconductor chip-mounting board

Abstract

A strengthening land is formed on a semiconductor chip-mounting board corresponding to a non-operating electrode on a semiconductor chip. The strengthening land and the non-operating electrode are bonded with each other, thereby improving a bonding strength between the semiconductor chip and the semiconductor chip-mounting board.

What is claimed is:  
     
       1. A method for mounting a semiconductor chip to a semiconductor chip-mounting board which includes a semiconductor chip-mounting face with bonding lands and a circuit board-mounting face, opposed to the semiconductor chip-mounting face, which allows an electrical connection to be established between the semiconductor chip-mounting board and a circuit board, said method comprising: 
       facing a circuit formation face of the semiconductor chip to the semiconductor chip-mounting face;  
       electrically connecting electrodes formed on the circuit formation face with the bonding lands, and a non-operating electrode formed on the circuit formation face and functionally not related to the semiconductor chip with a strengthening land for increasing a connection strength of the semiconductor chip onto the semiconductor chip-mounting board, via a bonding material by a flip-chip mounting method; and  
       forming, after the semiconductor chip is mounted to the semiconductor chip-mounting board, a solder resist at a part on the semiconductor chip-mounting face which is separated a distance not smaller than a sum of a thickness of the semiconductor chip and a gap between the semiconductor chip-mounting face and the circuit formation face from a projected position, onto the semiconductor chip-mounting face, from a side face of the semiconductor chip in a direction opposite to the semiconductor chip.  
     
     
       2. A method for mounting a semiconductor chip according to  claim 1 , wherein a sealing resin is injected between the semiconductor chip and the semiconductor chip-mounting board from an injection start mark enabling recognition of an injection start position of the sealing resin which is formed at the semiconductor chip-mounting face. 
     
     
       3. A method for mounting a semiconductor chip according to  claim 1 , wherein the semiconductor chip-mounting board contains a material having a thermal expansion coefficient of not smaller than that of silicon, and has a glass transition point exceeding drying and setting temperatures of the bonding material, whereby a sealing resin is provided between the semiconductor chip and the semiconductor chip-mounting board after the semiconductor chip is mounted to the semiconductor chip-mounting board, a setting temperature of the sealing resin being exceeded by the glass transition point of the semiconductor chip-mounting board. 
     
     
       4. A method for mounting a semiconductor chip to a semiconductor chip-mounting board which includes a semiconductor chip-mounting face with bonding lands and a circuit board-mounting face, opposed to the semiconductor chip-mounting face, which allows an electrical connection to be established between the semiconductor chip-mounting board and a circuit board, said method comprising: 
       facing a circuit formation face of the semiconductor chip to the semiconductor chip-mounting face; and  
       electrically connecting electrodes formed on the circuit formation face with the bonding lands, and a non-operating electrode formed on the circuit formation face and functionally not related to the semiconductor chip with a strengthening land for increasing a connection strength of the semiconductor chip onto the semiconductor chip-mounting board, via a bonding material by a flip-chip mounting method;  
       wherein a sealing resin is injected between the semiconductor chip and the semiconductor chip-mounting board from an injection start mark enabling recognition of an injection start position of the sealing resin which is formed at the semiconductor chip-mounting face.  
     
     
       5. A method for mounting a semiconductor chip to a semiconductor chip-mounting board which includes a semiconductor chip-mounting face with bonding lands and a circuit board-mounting face, opposed to the semiconductor chip-mounting face, which allows an electrical connection to be established between the semiconductor chip-mounting board and a circuit board, said method comprising: 
       facing a circuit formation face of the semiconductor chip to the semiconductor chip-mounting face; and  
       electrically connecting electrodes formed on the circuit formation face with the bonding lands, and a non-operating electrode formed on the circuit formation face and functionally not related to the semiconductor chip with a strengthening land for increasing a connection strength of the semiconductor chip onto the semiconductor chip-mounting board, via a bonding material by a flip-chip mounting method;  
       wherein a sealing resin is injected between the semiconductor chip and the semiconductor chip-mounting board from an injection start mark enabling recognition of an injection start position of the sealing resin which is formed at the semiconductor chip-mounting face; and  
       wherein the semiconductor chip-mounting board contains a material having a thermal expansion coefficient of not smaller than that of silicon, and has a glass transition point exceeding drying and setting temperatures of the bonding material, whereby the sealing resin is provided between the semiconductor chip and the semiconductor chip-mounting board after the semiconductor chip is mounted to the semiconductor chip mounting board, a setting temperature of the sealing resin being exceeded by the glass transition point of the semiconductor chip-mounting board.  
     
     
       6. A method for mounting a semiconductor chip to a semiconductor chip-mounting board which includes a semiconductor chip-mounting face with bonding lands and a circuit board-mounting face, opposed to the semiconductor chip-mounting face, which allows an electrical connection to be established between the semiconductor chip-mounting board and a circuit board, said method comprising: 
       facing a circuit formation face of the semiconductor chip to the semiconductor chip-mounting face; and  
       electrically connecting electrodes formed on the circuit formation face with the bonding lands, and a non-operating electrode formed on the circuit formation face and functionally not related to the semiconductor chip with a strengthening land for increasing a connection strength of the semiconductor chip onto the semiconductor chip-mounting board, via a bonding material by a flip-chip mounting method;  
       wherein the semiconductor chip-mounting board contains a material having a thermal expansion coefficient of not smaller than that of silicon, and has a glass transition point exceeding drying and setting temperatures of the bonding material, whereby a sealing resin is provided between the semiconductor chip and the semiconductor chip-mounting board after the semiconductor chip is mounted to the semiconductor chip-mounting board, a setting temperature of the sealing resin being exceeded by the glass transition point of the semiconductor chip-mounting board.